NAD 214 Power Amp Fault

The electric supply in my current house is pretty dodgy, bulbs keep blowing etc. Yesterday I was listening to a couple of cds at a quiet volume, when suddenly my NAD 214 power amp just switched off, with a click. Switched the amp off, then switched it back on, and only the red light came on, when normally after a short period of time the amp 'clicks' and a green light takes its place. No such luck. Have you people got any ideas as to what could be wrong?